PJB-2017-519
Population structure and spatial distribution pattern of dominant species in forest communities in the Xiaowutai Mountain, China
XiaohangBai
Abstract
The point pattern analysis is the important means of studying community structure, interspecific interaction, and the relationship between the population and environment. We analyzed population structure, spatial distribution pattern, intra and interspecific competition of the dominant tree species in four forest communities (Pinus tabulaeformis forest, Betula platyphylla forest, Betula albosinensis forest, Larix principis-rupprechtii forest) in the Xiaowutai Mountain by point pattern analysis and Monte-Carlo simulation test. The results showed that Pinus tabulaeformis, Betula platyphylla, Betula albosinensis, Larix principis-rupprechtii were main constructive species of forest communities in the Xiaowutai Mountain. Pinus tabulaeformis presented random mode on the small scales and cluster mode on the larger scales. They were expanding populations mainly affected by intraspecific competition. Betula platyphylla presented random mode on all the scales. They were diminishing population mainly affected by interspecific competition. Betula albosinensis presented cluster mode on the small scales and random mode on the larger scales. They were stable population existing intraspecific competition and interspecific competition. Larix principis-rupprechtii presented cluster mode on the small scales and random mode on the larger scales. They were expanding populations mainly affected by intraspecific competition. The interspecific analysis showed that on the scale of 2.4m-22.5m, Betula platyphylla and Acer mono had a significant negative correlation. On the scale of 3.5m-7.5m, Betula albosinensis and Sorbus alnifolia had a significant negative correlation. This paper conducted a detailed analysis of population age structure and spatial patterns of four forest communities to elucidate peculiarities of population processes and their drivers. Meanwhile, we attempted to provide a theoretical basis and development strategies for balanced natural resource protection in the area.
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